Alert archive / California / Flash Flood Warnings in 2015

Flash Flood Warning 9, NWS San Diego, CA

July 19, 2015San Diego County, California

NWS San Diego, CA issued this flash flood warning at Jul 19, 2015, 3:07 PM PDT for San Diego County, California. It was in force for 3 hr. 6 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 19, 2015, 3:07 PM PDT (22:07 UTC)
Expired: Jul 19, 2015, 6:00 PM PDT
In force: 3 hr
Issued by: NWS San Diego, CA
Area: Storm-based polygon
Flood severity: None

County San Diego County, CA

The radar

The San Diego radar (KNKX), 29 km from the middle of the area, began a volume at 22:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 3:07 PM PDT	FLASH FLOOD	2 Ene Ramona, CA	CHP REPORTS ROAD COMPLETELY WASHED OUTAT HIGHWAY 78 AND RAMONA VIEW DR.
Jul 19, 3:17 PM PDT	FLASH FLOOD	1 Nw Ramona, CA	CHP REPORTS MASSIVE FLOODING CLOSING DOWN 11TH STREET IN RAMONA.
Jul 19, 3:17 PM PDT	FLASH FLOOD	1 Wnw Ramona, CA	CHP REPORTS MASSIVE FLOODING CLOSING DOWN 11TH STREET IN RAMONA.
Jul 19, 3:27 PM PDT	FLASH FLOOD	2 Nw San Diego Country, CA	CHP REPORT OF ROCKS IN THE ROADWAY, A MUD SLIDE, AND WATER WASHING FENCES INTO THE ROADWAY AT VISTA RAMONA RD.
Jul 19, 5:42 PM PDT	FLASH FLOOD	Ramona, CA	TRAINED SOTTER REPORTED 3 FT DEEP WATER AT RAMONA RD AND LAWRENCE ST. SOME RESIDENTS ARE NOT ABLE TO EVACUATE.
Jul 19, 5:45 PM PDT	FLASH FLOOD	1 Sw Ramona, CA	A RESIDENT AND THEIR CHILD ON LAWRENCE LANE WERE STRANDED IN THEIR HOME BY FLOOD WATERS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 10.1 hours before the alert went out and 49 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 335 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1500 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

891 
WGUS56 KSGX 192207
FFWSGX
CAC073-200100-
/O.NEW.KSGX.FF.W.0009.150719T2207Z-150720T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN DIEGO CA
307 PM PDT SUN JUL 19 2015

THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL SAN DIEGO COUNTY IN SOUTHWESTERN CALIFORNIA...

* UNTIL 600 PM PDT
    
* AT 306 PM PDT...DOPPLER RADAR INDICATED AN AREA OF THUNDERSTORMS 
  PRODUCING HEAVY RAIN ACROSS THE RAMONA AND SAN DIEGO COUNTRY 
  ESTATES AREA. FLASH FLOODING WILL LIKELY BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL LIKELY EXPERIENCE FLOODING INCLUDE...
  POWAY...RAMONA...ALPINE...VALLEY CENTER...TIERRASANTA...
  ESCONDIDO...SAN MARCOS...SANTEE...SAN DIEGO COUNTRY ESTATES...
  DESCANSO...PALOMAR MOUNTAIN...HWY 79 BETWEEN SANTA YSABEL AND
  WARNER SPRINGS...SAN PASQUAL...HWY 78 BETWEEN RAMONA AND SANTA
  YSABEL...LAKE HENSHAW...S7 - EAST GRADE RD...SCRIPPS RANCH...
  LAKESIDE...PALOMAR MOUNTAIN STATE PARK AND HWY S2 BETWEEN HWY 79
  AND HWY 78.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3288 11661 3285 11705 3322 11718 3335 11684
      3324 11658 3308 11665

$$

HARRISON

1 follow-up statement

618 
WGUS76 KSGX 192259
FFSSGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN DIEGO CA
359 PM PDT SUN JUL 19 2015

CAC073-200100-
/O.CON.KSGX.FF.W.0009.000000T0000Z-150720T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN DIEGO CA-
359 PM PDT SUN JUL 19 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM PDT FOR
CENTRAL SAN DIEGO COUNTY...

AT 355 PM PDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER THE WARNED AREA.  FLASH 
FLOODING IS EXPECTED TO CONTINUE TO IMPACT THE WARNED AREA. RAINFALL 
OF 3 INCHES OR MORE HAS FALLEN OVER THE LAST 2 HOURS. 

FLASH FLOODING REPORTED OVER THE LAST 30 MINUTES INCLUDE HIGHWAY 78 
WASHED OUT AT RAMONA VIEW DRIVE...AND ADDITIONAL FLASH FLOODING AT 
THE INTERSECTION OF HIGHWAYS 78 AND 67.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
POWAY...RAMONA...ALPINE...VALLEY CENTER...TIERRASANTA...ESCONDIDO...
SAN MARCOS...SANTEE...SAN DIEGO COUNTRY ESTATES...DESCANSO...PALOMAR
MOUNTAIN...HWY 79 BETWEEN SANTA YSABEL AND WARNER SPRINGS...SAN
PASQUAL...HWY 78 BETWEEN RAMONA AND SANTA YSABEL...LAKE HENSHAW...S7
- EAST GRADE RD...SCRIPPS RANCH...LAKESIDE...PALOMAR MOUNTAIN STATE
PARK AND HWY S2 BETWEEN HWY 79 AND HWY 78.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

&&

LAT...LON 3288 11661 3285 11705 3322 11718 3335 11684
      3324 11658 3308 11665

$$

JMB

The office that day

Everything else NWS San Diego, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 12:24 PM PDT	Areal Flood Advisory	SGX	San Diego	8 hr
Jul 19, 1:27 PM PDT	Areal Flood Advisory	SGX	Riverside, San Diego	5 hr
Jul 19, 1:55 PM PDT	Severe Thunderstorm Warning	SGX	Riverside	65 min
Jul 19, 1:58 PM PDT	Flash Flood Warning	SGX	San Diego	3 hr
Jul 19, 2:37 PM PDT	Areal Flood Advisory	SGX	San Diego	4 hr
Jul 19, 2:50 PM PDT	Flash Flood Warning	SGX	Riverside, San Bernardino	3 hr
Jul 19, 3:16 PM PDT	Areal Flood Advisory	SGX	San Bernardino	3 hr
Jul 19, 3:34 PM PDT	Flash Flood Warning	SGX	Riverside, San Bernardino	5 hr
Jul 19, 4:35 PM PDT	Flash Flood Warning	SGX	Riverside	5 hr
Jul 19, 4:40 PM PDT	Flash Flood Warning	SGX	Orange	6 hr

Nearby

Flash Flood Warnings in California, 2015 Every flash flood warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.